How do I find an object's specific content in a list?

Question

I have a bunch of objects in a list that have a field called "number". Let the list be called "collected".

How would I find the object in the list that has "4" in its field?

I tried

class stats:
    def __init__(self, numba):
        self.Number = int(numba)

if (collected.Number == 4):
 #do stuff

However, I get an error that says 'list' object has no attribute 'number' And even if this worked, how would I be able to see which index of the list has even found the "4"?

Because you called the field `Number`, not `number`. Spelling matters. — Tim Roberts, Jul 27 '21 at 20:44
You need to create an instance of `stats` first. Like `x = stats(4)`. Then you can check if `x.Number == 4` since `x` is a `stats` object. — SyntaxVoid, Jul 27 '21 at 20:49
You said _Let the list be called "stats"_ but then you said _the class above was called `stats`_. Which is it? A class is not a list. — Pranav Hosangadi, Jul 27 '21 at 20:50

score 0 · Answer 1 · answered Jul 27 '21 at 20:45

0

Do you mean:

def findindex(lst,value):
    for i,n in enumerate(lst):
        if n.Number == value:
            return i
    return -1

answered Jul 27 '21 at 20:45

Tim Roberts

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What would n be in this case? Is it just a temporary object? – LearningNewLanguages123 Jul 27 '21 at 21:07
You can look up the `enumerate` function. Each time through the loop, `i` will have the index of the item, and `n` will be the corresponding element of the list. – Tim Roberts Jul 28 '21 at 00:10

score 0 · Answer 2 · edited Jul 27 '21 at 20:49

0

If stats is a list containing instances of Data then the stats list doesn't have a Number attribute, the elements do.

stats[i].Number would be legal, for any i in range(len(stats)).

edited Jul 27 '21 at 20:49

Matiiss

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answered Jul 27 '21 at 20:47

How would I define that [i] in a conditional if I am trying to check if "4" is in the lists' object's attribute? – LearningNewLanguages123 Jul 27 '21 at 21:02

How do I find an object's specific content in a list?

2 Answers2